Erno Alanko

I've done the basic power ups like headers, ECU tune, intake and exhaust with no cats (primary cats ere in place at the time).

I had two friends on board when we had a rolling start with my friend. From 60km/h to 200 i pulled neck all the time. Audi is stock 4wd with 450hp. My car was dynoed 350hp from tires back then.

Don't know the gainf from removing the primary cats finally but can't hurt and the noise got even better😁

https://vimeo.com/779500538